a) There is a local min at x = 3 c) There is an x-intercept at x = 3 _7. If ƒ '(3) = 0 and ƒ"(3) < 0, then which of the following must be true? b) There is an inflection point at x = 3 d) There is a local max at x = 3 8. For a function g(x), g"(3) == 8 indicates that g(x) is at x = 3. a) Increasing b) Decreasing c) Concave Down d) Concave Up